Detectives in Stoke-on-Trent are appealing for witnesses following an assault in Tunstall.
Officers were called to Furlong Road at around 10.30pm on Friday 30 September following a report of a fight.
A 15-year-old boy had sustained a head injury and was taken to the University Hospital of North Staffordshire for treatment. He was discharged a short time later.
A 45-year old man suffered a broken jaw and was taken to Aintree Hospital in Liverpool for specialist treatment. He was discharged yesterday, Sunday 2 October. He has been arrested in connection with the incident and has been bailed, pending further inquiries, to a date later this month.
An investigation into the incident is underway and detectives are pursuing several lines of inquiry including speaking to witnesses, carrying out house to house visits and gathering (CCTV) closed circuit television footage from the locality.
At this stage police have not recovered any weapon which may have been used in the fight.
Chief Inspector Adrian Roberts, commander of Stoke-on-Trent North Local Policing Team (LPT), said: "This area of Tunstall was extremely busy on Friday night with people out enjoying the warm weather.
"I would encourage anyone who witnessed the incident, or has any information, to contact us if they have not already done so.
"Such acts of violence will not be tolerated by Staffordshire Police and a detailed investigation into the incident is now underway to establish the exact circumstances of what has happened.
"Neighbourhood officers are carrying out high visibility patrols in the area to reassure local residents and I would encourage people to inform the officers of any issues which are causing them concern."
Anyone with information is urged to contact DC Louise Giles at Staffordshire Police on 0300 123 4455 quoting incident number 955 of September 30 or Crimestoppers anonymously on 0800 555 111.